Growth of ZnS microfans and nanosheets: Controllable morphology and phase
- 作者：Xuyang Wang ; Yongchun Zhu ; Hai Fan ; Maofeng Zhang ; Baojun Xi ; Haizhen Wang ; Yitai Qian
- 关键词：A1. Crystal morphology ; A1. Crystal structure ; A2. Solvothermal crystal growth ; B1. Sulfides ; B2. Semiconducting II– ; VI materials
- 刊名：Journal of Crystal Growth
- 出版年：2008
- 期刊代码：49_00220248
- 类别：ch
- 出版时间：1 May 2008
- 卷：310
- 期：10
- 页码：2525-2531
- 文件大小：1059 K
摘要
Zinc sulfide with different phases and morphologies were solvothermally synthesized in diethylenetriamine (DETA) or a mixed solution of DETA and water at 180 °C. Wurtzite ZnS microfans composed of nanobelts with thickness of 30 nm were formed in pure DETA. Sphalerite ZnS nanosheets with thickness of 20 nm were produced in a mixed solvents of DETA and water with a volume ratio of 3:1. As the volume ratio of DETA to water was more than 3:1, the products were also nanosheets, while these nanosheets were in the mixed phases of wurtzite and sphalerite. UV–vis absorption spectrum of the wurtzite ZnS microfans showed a strong blue shift of 27 nm relative to the band gap of bulk wurtzite ZnS, which was attributed to the quantum size effect. Photoluminescence (PL) spectrum of wurtzite ZnS microfans presented a strong emission at 432 nm and a weak emission at 412 nm, which are in accordance with the reported data. The sphalerite ZnS nanosheets had a PL peak at 424 nm, indicating a weak deep-trap emission feature.